Mustang Ford Racing Adjustable Brake Proportioning Valve by Ford Performance

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  • Ford Racing Mustang Adjustable Brake Proportioning Valve M-2328-C
Ford Racing Mustang Adjustable Brake Proportioning Valve M-2328-C

Adjust the fluid pressure in your brakes with this Ford Performance adjustable brake proportioning valve.

Item #M2328C
MPN# M-2328-C

Everyday Low Price: $54.99

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  • Allows Adjustment Of Fluid Pressures To Correct Brake Bias


  • Lightweight Billet Aluminum
  • Made In The USA
  • Fully Adjustable From 100-1000psi
  • Ford Racing Logo
  • Ford Racing #M-2328-C

What's in the Box

  • (1) Proportioning Valve

Made in the USA

Product Description

Ford Performance Mustang Propotioning Valve
The Ford Performance M-2328-C Adjustable Proportioning Valve is cast from lightweight aluminum (only .5lb!) & is compact in design. It allows adjustment of fluid pressure to correct rear brake bias. The “Kneepoint” is adjustable from 100-1000psi. The housing has inlet and outlet ports with 1/8-27 NPT (National Pipe Thread) threads for maximum installation flexibility & includes the needed adapters to be a direct install for 79-93 Mustang.

INSTALLATION & ADJUSTMENTS - Proportioning valves are normally installed in the rear fluid line to prevent the rear wheels from locking before the front wheels, or to give a driver the ability to make fine adjustments in front to rear bias percentage on the track to compensate for tire wear, fuel load burn-off, or changing track conditions. It is generally not recommended to attempt to reduce front wheel braking capacity.

Use only the two .25" body holes to secure the valve to a mount. Do not attempt to remove the adjuster knob or valve body end cap to facilitate thru-panel mounting.

Two 1/8-27 NPT to 3/8-24 inverted flare fittings are supplied to adapt double flared hard brake lines to the valve. Connect the "IN" port to the pressure line coming from the master cylinder. Connect the line going to the calipers to the "OUT" port.

The adjusting knob is marked with an arrow indicating the direction required to decrease line pressure to the calipers. The knob rotated all the way out (counter-clockwise) will provide a maximum pressure reduction of 57%. Rotating the know in (clockwise) will incrementally increase line pressure, up to full pressure. If the range of adjustment in the valve is not sufficient to properly balance the vehicle’s bias, changes to other components within the system may be necessary.

TESTING THE SYSTEM - Do not attempt to operate the vehicle until the system has been fully tested under controlled conditions in a safe location. After the system has been bled, checked for leaks, and the proper pedal resistance and travel have been determined, make a series of low speed stops, then gradually progress to normal operating speeds.

WARNING - Adjustable proportioning valves are designed for tuning and balancing custom brake systems on performance, racing, and other types of special purpose vehicles. They are not designed as direct replacements for any OEM application.

It is the responsibility of the person installing any brake component or kit to determine the suitability of the component or kit for that particular application. If you are not sure how to safely use this brake component or kit, you should not install or use it. Do not assume anything. Improperly installed or maintained brakes are dangerous. If you are not sure, get help or return the product. You may obtain additional information and technical support by calling at (254) 296-6500, or visit our web site at Use o technical support does not guarantee proper installation. You, or the person who does the installation must know how to properly use this product. It is not possible over the phone to understand or foresee all the issues that might arise in your installation. Racing equipment and brakes must be maintained and should be checked regularly for fatigue, damage, and wear.

-Fits 1979-1993 Mustang

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  • Customer Photos (5)

    Vehicle Applications

    Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93)

    About This Brand

    Ford Performance
    Ford Performance - Mustang Ford Racing Parts
    Ford Performance Parts is the leader in performance parts and accessories for Mustang and Ford Lightning. is proud to offer Ford Racing Performance Parts for your project. Ford Racing is dedicated to manufacturing the highest quality products offered in the industry. Choose from suspension, exhaust, wheels, and other performance parts at If you want the best for your Mustang or SVT Ligtning, look no further than Ford Performance Parts!

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